package com.boxuegu.activity;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.KeyEvent;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.boxuegu.R;
import com.boxuegu.view.CourseView;
import com.boxuegu.view.ExercisesView;
import com.boxuegu.view.MyInfoView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    /**
     * 视图
     */
    private CourseView mCourseView;
    private ExercisesView mExercisesView;
    private MyInfoView mMyInfoView;
    /**
     * 中间内容栏
     */
    private FrameLayout mBodyLayout;
    /**
     * 底部按钮栏
     */
    public LinearLayout mBottomLayout;
    /**
     * 底部按钮
     */
    private View mCourseBtn;
    private View mExercisesBtn;
    private View mMyInfoBtn;
    private TextView tv_course;
    private TextView tv_exercises;
    private TextView tv_myInfo;
    private ImageView iv_course;
    private ImageView iv_exercises;
    private ImageView iv_myInfo;
    private TextView tv_back;
    private TextView tv_main_title;
    private RelativeLayout rl_title_bar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //设置此界面为竖屏
        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
        init();
        initBottomBar();
        setListener();
        setInitStatus();
    }
    /**
     * 获取界面上的UI控件
     */
    private void init() {
        tv_back = (TextView) findViewById(R.id.tv_back);
        tv_main_title = (TextView) findViewById(R.id.tv_main_title);
        tv_main_title.setText("视频首页");
        rl_title_bar = (RelativeLayout) findViewById(R.id.title_bar);
        rl_title_bar.setBackgroundColor(Color.parseColor("#E7C00F"));
        tv_back.setVisibility(View.GONE);
        initBodyLayout();
    }
    /**
     * 获取底部导航栏上的控件
     */
    private void initBottomBar() {
        mBottomLayout = (LinearLayout) findViewById(R.id.main_bottom_bar);
        mCourseBtn = findViewById(R.id.bottom_bar_course_btn);
        mExercisesBtn = findViewById(R.id.bottom_bar_exercises_btn);
        mMyInfoBtn = findViewById(R.id.bottom_bar_myinfo_btn);
        tv_course = (TextView) findViewById(R.id.bottom_bar_text_course);
        tv_exercises = (TextView) findViewById(R.id.bottom_bar_text_exercises);
        tv_myInfo = (TextView) findViewById(R.id.bottom_bar_text_myinfo);
        iv_course = (ImageView) findViewById(R.id.bottom_bar_image_course);
        iv_exercises = (ImageView) findViewById(R.id.bottom_bar_image_exercises);
        iv_myInfo = (ImageView) findViewById(R.id.bottom_bar_image_myinfo);
    }
    private void initBodyLayout() {
        mBodyLayout = (FrameLayout) findViewById(R.id.main_body);
    }
    /**
     * 控件的点击事件
     */
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            //课程的点击事件
            case R.id.bottom_bar_course_btn:
                clearBottomImageState();
                selectDisplayView(0);
                break;
            //习题的点击事件
            case R.id.bottom_bar_exercises_btn:
                clearBottomImageState();
                selectDisplayView(1);
                break;
            //我的点击事件
            case R.id.bottom_bar_myinfo_btn:
                clearBottomImageState();
                selectDisplayView(2);
                if (mMyInfoView != null) {
                    mMyInfoView.setLoginParams(readLoginStatus());
                }
                break;
            default:
                break;
        }
    }
    /**
     * 设置底部三个按钮的点击监听事件
     */
    private void setListener() {
        for (int i = 0; i < mBottomLayout.getChildCount(); i++) {
            mBottomLayout.getChildAt(i).setOnClickListener(this);
        }
    }
    /**
     * 清除底部按钮的选中状态
     */
    private void clearBottomImageState() {
        tv_course.setTextColor(Color.parseColor("#666666"));
        tv_exercises.setTextColor(Color.parseColor("#666666"));
        tv_myInfo.setTextColor(Color.parseColor("#666666"));
        iv_course.setImageResource(R.drawable.main_course_icon);
        iv_exercises.setImageResource(R.drawable.main_exercises_icon);
        iv_myInfo.setImageResource(R.drawable.main_my_icon);
        for (int i = 0; i < mBottomLayout.getChildCount(); i++) {
            mBottomLayout.getChildAt(i).setSelected(false);
        }
    }
    /**
     * 设置底部按钮选中状态
     */
    public void setSelectedStatus(int index) {
        switch (index) {
            case 0:
                mCourseBtn.setSelected(true);
                iv_course.setImageResource(R.drawable.main_course_icon_selected);
                tv_course.setTextColor(Color.parseColor("#f49025"));
                rl_title_bar.setVisibility(View.VISIBLE);
                tv_main_title.setText("视频首页");
                break;
            case 1:
                mExercisesBtn.setSelected(true);
                iv_exercises
                        .setImageResource(R.drawable.main_exercises_icon_selected);
                tv_exercises.setTextColor(Color.parseColor("#0097F7"));
                rl_title_bar.setVisibility(View.VISIBLE);
                tv_main_title.setText("视频攻略");
                break;
            case 2:
                mMyInfoBtn.setSelected(true);
                iv_myInfo.setImageResource(R.drawable.main_my_icon_selected);
                tv_myInfo.setTextColor(Color.parseColor("#0097F7"));
                rl_title_bar.setVisibility(View.GONE);

        }
    }
    /**
     * 移除不需要的视图
     */
    private void removeAllView() {
        for (int i = 0; i < mBodyLayout.getChildCount(); i++) {
            mBodyLayout.getChildAt(i).setVisibility(View.GONE);
        }
    }
    /**
     * 设置界面view的初始化状态
     */
    private void setInitStatus() {
        clearBottomImageState();
        setSelectedStatus(0);
        createView(0);
    }
    /**
     * 显示对应的页面
     */
    private void selectDisplayView(int index) {
        removeAllView();
        createView(index);
        setSelectedStatus(index);
    }
    /**
     * 选择视图
     */
    private void createView(int viewIndex) {
        switch (viewIndex) {
            case 0:
                //课程界面
                if (mCourseView == null) {
                    mCourseView = new CourseView(this);
                    mBodyLayout.addView(mCourseView.getView());
                } else {
                    mCourseView.getView();
                }
                mCourseView.showView();
                break;
            case 1:
                //
                if (mExercisesView == null) {
                    mExercisesView = new ExercisesView(this);
                    mBodyLayout.addView(mExercisesView.getView());
                } else {
                    mExercisesView.getView();
                }
                mExercisesView.showView();
                break;
            case 2:
                //我的界面
                if (mMyInfoView == null) {
                    mMyInfoView = new MyInfoView(this);
                    mBodyLayout.addView(mMyInfoView.getView());
                } else {
                    mMyInfoView.getView();
                }
                mMyInfoView.showView();
                break;
        }
    }
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(data!=null){
            //从设置界面或登录界面传递过来的登录状态
            boolean isLogin=data.getBooleanExtra("isLogin",false);
            if(isLogin){//登录成功时显示课程界面
                clearBottomImageState();
                selectDisplayView(0);
            }
            if (mMyInfoView != null) {//登录成功或退出登录时根据isLogin设置我的界面
                mMyInfoView.setLoginParams(isLogin);
            }
        }
    }
    protected long exitTime;//记录第一次点击时的时间
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK
                && event.getAction() == KeyEvent.ACTION_DOWN) {
            if ((System.currentTimeMillis() - exitTime) > 2000) {
                Toast.makeText(MainActivity.this, "再按一次退出app",
                        Toast.LENGTH_SHORT).show();
                exitTime = System.currentTimeMillis();
            } else {
                MainActivity.this.finish();
                if (readLoginStatus()) {
                    //如果退出此应用时是登录状态，则需要清除登录状态，同时需清除登录时的用户名
                    clearLoginStatus();
                }
                System.exit(0);
            }
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
    /**
     * 获取SharedPreferences中的登录状态
     */
    private boolean readLoginStatus() {
        SharedPreferences sp = getSharedPreferences("loginInfo",
                Context.MODE_PRIVATE);
        boolean isLogin = sp.getBoolean("isLogin", false);
        return isLogin;
    }
    /**
     * 清除SharedPreferences中的登录状态
     */
    private void clearLoginStatus() {
        SharedPreferences sp = getSharedPreferences("loginInfo",
                Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();//获取编辑器
        editor.putBoolean("isLogin", false);//清除登录状态
        editor.putString("loginUserName", "");//清除登录时的用户名
        editor.commit();//提交修改
    }
}